Collapsible scaffold



April 16, 1946.

w. E. THORNE' GOLLAPSIBLE SCAFFOLD-' Filed May 25, 1945 2 Sheets-Sheet 1 W11 Z Zv 'am' E'. Thorne April 16, 1946. w. E. THORNE COLLAPSIBLE SCAFFQLD Filed. May 25,1 1945 2 Sheets-Sheet 2 v u. I 2 a mmwm 2 wazaam E/T'horfze Patented Apr. 16, 1946 UNlTE' T E S T io-FFicE 1 Claim.

This invention resides in scaffolds and more particularly a collapsible scaffold.

One of the objects of this invention resides in the provision of a scaffold adapted to be readily assembled into operative position against a building wall and also disassembled for transportation in compact condition.

Another object of this invention resides in the particular construction of the scaffold standards.

A further object of this invention resides in the provision of standards whereby the board walk can be disposed at different heights, without adjusting the supporting arms thereof.

A still further object of this invention resides in the particular manner of disposing the board walk supporting arms on the standards.

Aside from the aforesaid objects, this invention resides in the particular manner of locking the board walk supporting arms in rigid relation to the legs of the standards. a

In addition to the foregoing objects, this invention resides in the particular construction of the legs of the standards.

Among the many objects of this invention is the novel manner of disposing the extension bracket on the standard.

One of the salient features of this invention resides in the combination of the standard and extension bracket.

With these and other objects in view, this invention resides in certain novel features of construction and arrangement of elements to be hereinafter more particularly set forth in the specification, illustrated in the accompanying drawings and pointed out in the appended claim and, while a this disclosure depicts my present conception of the invention, the right is reserved to resort to such changes in construction and arrangement of elements as come within the spirit of the invention.

In the accompanying drawings forming a part of this application;

Fig. l is a front view of a scaffold as constructed in accordance with this invention.

Fig. 2 is an end view thereof.

Fig. 3 is a perspective view of one of the standards per se.

Fig. 4 is an end view of one of the standards in collapsed condition.

Fig. 5 is an enlarged perspective view of one of the locking devices.

Fig. 6 is a perspective view of the extension bracket per se.

In the present illustration of this invention the numeral 5 designates, in general, a scaffold preferably constructed from standard wooden members rigidly connected together by metal fasteners and braces also of non-critical material and consists of spaced standards 6, a board walk!- I and extension brackets B, the standards and extension brackets, of course, being utilized to support the board walk at elected heights against a wall or othe support and, through the provision of said elements, work on a building or the like will progress from one height to another without disturbing the initial disposition of the standards.

Each of the aforesaid standards 6 consists of an upright beam 9 supported on a cross piece II] which in turn is secured to the lower portions of legs H having their upper ends secured to the aforesaid beam against its upper end with their lower portions diverging sidewise therefrom into substantially inverted V-shape configuration, said elements being connected in rigid relation to one another by suitable fastening elements l2.

Secured in vertical spaced relation to the upper portion of the aforesaid said beam 9 and extending outwardly therefrom are substantially U- shape guide brackets l3 and M, the former of which accommodates the inner end of a board walk supporting arm I5 resting on the upper end of the beam 9 when in operative position and pivoted relative thereto as by a bolt l6 or the like.

Pivotally disposed on the beam 9 a suitable distance below the arm I5, as by a substantially U -shape bracket l8 and pivoted bolt [9 is a second arm 20 of greater length than the first mentioned arm so as to support the standard in leaning position against a vertical support and thereby prevent it from tilting therefrom under the weight and movement of workmen on the scafiold.

Each of the aforesaid arms are retained in their normal or board walk supporting positions by substantially V-shape braces 2| connected to the legs II by hinges 22 and removably locked to the arms at their free ends by pivoted clevises 23 preferably engaging notches 24 in the ends thereof.

The aforesaid extension bracket 8 consists of a standard 25 rigidly supporting an arm 26 at its upper end as by suitable fastening elements 21 and a brace 28. Said arm 26 is of lesser length than the aforesaid arms [5 and 20 to permit all of said arms to bear against a wall or the like and thereby retain the standards in leaning positions against the same as heretofore set forth. In order to prevent the standards from rocking relative to their support, elongated feet 29 are rigidly secured to the free ends of the arms I5, 20 and 26.

Formed in the outer edge of the standard 25 is a plurality of notches 30 in an elected one of which is removably engaged a pivoted clevis 3| secured to the beam 9 and adapted to retain the bracket 8 at various heights relative to the standard 6.

With this invention fully described, it is manifest that a scaffold is provided which can be readily erected without the use of means for fastening it to the building walls and the like and, through the instrumentality of the particularly constructed standards, the board walk can be disposed at various heights without disturbing the initial disposition of the standards.

Having thus described my invention what I claim and desire to protect by Letters Patent is:

In a scaffold standard comprising, a substantially vertical beam, outwardly diverging legs secured to the beam adjacent its upper end, a sill connecting the lower portions of the legs and supporting the lower end of the beam, means securing the aforesaid elements in rigid relation relative to one another, guide brackets secured to the beams adjacent its upper end, inwardly extending arms pivotally supported by the beam, laterally extending bearing feet rigidly secured to the outer ends of the arms, substantially inverted V-shape braces hingedly connected to the legs and having their free ends bearing beneath the arms, substantially U-shape clevises pivoted to said arms and removably engaging notches in the aforesaid braces, an extension bracket including a standard slidably disposed in the guide brackets and a braced arm having a bearing foot thereon secured thereto, and a clevis pivotally secured to the beam and removably engaging a selected notch in the standard of the extension bracket.

WILLIAM EARL THORNE. 

